One more item on ThemeClick.com on this category. A Complete Congress and Event Manager WordPress Plugin. Congress & Events Manager Allows to you: display your events, congress & organizations in any page with one shortcode easily.
Supports services listed at http://codex.wordpress.org/Embeds. (oEmbed)
Documentation : http://themeofwp.com/plugins/cpmanager/doc
We are sure after from the success installation from this item Congress and Event Manager WordPress Plugin to your website you will be very satisfied